Trouble Shooting Guide; Trouble Shooting The Gas Control System - Kingsman MDVR38N Installation Instructions Manual

WARNING: BEFORE DOING ANY GAS CONTROL SERVICE WORK, REMOVE THE GLASS FRONT.
NOTE: Before troubleshooting the gas control system, be sure external gas shut off is in the "On" position.
Problem
Spark igniter will not light.
Pilot will not stay lit after carefully
following lighting instructions.
Pilot burning, no gas to burner,
Valve knob "ON", Wall
Switch "ON"
Frequent Pilot outage problem.
Flame lifts off burner and goes out
in less than 30 seconds
Flame lifts off burner on
one side while the rest of
the flame remains lit.

Trouble Shooting The Gas Control System

Possible Causes
Defective or misaligned electrode
at pilot.
Defective igniter
(push-button)
Defective thermocouple
(flame switch where applicable)
Defective valve magnet.
Wall switch or wires
defective.
Generator may not be generating
sufficient voltage.
Plugged burner orifice.
Defective automatic valve
operator.
Pilot flame may be too low or
blowing (high) causing the pilot
safety to drop out.
Inner 4" liner has come off flue
or termination, flame is starving
for oxygen
Improper installation of firebrick.
Firebrick is likely leaning.
Corrective Action
Check for spark at electrode and pilot: if no spark and electrode wire is
properly connected, replace igniter.
Using a match, light pilot. If pilot lights, turn off pilot and push the red
button again. If pilot will not light - check gap at electrode and pilot
should be 1/8" to 1/4" to have a strong spark.
Check pilot flame. Must impinge on generator and thermocouple.
Clean and/or adjust pilot for maximum flame impingement on
generator and thermocouple. Replace thermocouple if pilot will not
hold. (Hand tight 1/8 turn on replacement)
Replace valve, if pilot won't hold after the thermocouple is replaced.
Check wall switch and wires for proper connections. Jumper wire
across terminals at wall switch. If burner comes on, replace defective
wall switch. If okay, jumper wires, across wall switch wires at valve.
If burner comes on, wires are faulty or connections are bad.
Check generator with millivolt meter. Take reading at generator termi-
nals of gas valve. Should read 325 millivolts minimum while holding
valve knob depressed in pilot position and wall switch "off" Replace
faulty generator if reading is below specified minimum.
Check burner orifice for stoppage and remove.
Remove wall switch wires from gas valve. Install jumper wires from
top bottom terminals of gas valve. Turn valve on "ON". If main burner
does not light, replace valve.
Clean and/or adjust pilot flame for maximum flame impingement
on generator and thermocouple.
Attach 4" liner to flue or termination using
screws, silicone and clamps as stated in manual
Be sure to postion firebrick against firebox walls and
be sure to use brick clips attached to the inner side
of firebox.
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